Vacuum producing apparatus for metal carafes



Um. My 1924,.

' W. WAGNER VACUUM PRODUCING APPARATUS FOR METAL CARAFES Filed 001:. 5, 1922- amnioc- Patented @ct. 14, 1924.

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OF CHICAGO. ILLINGIS.

VACUUM PRODUCING APPARATUS FOR METAL CABAFES.

Application filed October 5, 1922. Serial No. 592,666.

To all whom it may concern:

Be it known that I, WALTER lVAcNnR. a citizen of the United States of America, residing at Chicago, in the county of Cook and State of Illinois. have invented certain new and useful Improvements in Vacuum- Producing Apparatus for Metal Carafes, of which the following is a specification.

This invention relates to certain new and useful improvements in vacuum producing apparatus for metal carafes and bears close relation to the application filed by Walter l i agner for improvements in carafes on March 23, 1922, Serial No. 546,047 and three separate applications filed on even date herewith.

The primary object of the present invention resides in the provision of means for producing a vacuum in a metal carafe, said carafe is wreferably of three-wall formation, the embryo formation of the carafe including the inner and intermediate walls being permanently connected having a. vacuum producing apparatus associated therewith for exhausting air in the chamber between the two walls of the embryo formation.

A further object of the invention includes in a. vacuum producing means for a metal carafe of the type above set forth, the provision of a resiliently mounted base support for the carafe orembryo formation while in an. inverted position to cause a shaking or vibratory movement of the embryo formation for the purpose of loosening moisture from the walls and insulating packing during the act of creating the vacuum.

With the above and other objects in view, the invention consists of the novel form, combination and arrangement of parts hereinafter more fully described, shown in the accompanying drawing and claimed.

In the drawing, wherein like reference characters designate corresponding parts throughout the several views,

Figure l is a side elevational view of the embryo formation of a three-walled metal carafe, partly in section and associated with. a vacuum pump and tensioned base support, and

Figure 2 is a fragmentary side elevational view, partly broken away and shown in section of the tensioned base support for the embryo formation of the metal carafe.

Referring more in detail to the accompanying drawing, it being understood. that the embryo formation of the three-Walled metal carafe disclosed. in application tlerial No. 546,041? includes inner and outer walls 1 and 2, the bottom section of the outer wall 2 carries an externally threaded nipple 4 as clearly shown in Fig. 1. It is also to be clearly understood that when the embryo formation reaches its stage of completion as illustrated in this application, the chamber 5 between the inner and outer walls 1 and 2 thereof is filled with an insulating material such as lamp black that-is packed therein and the embryo formation is highly heated when associated with the vacuum producing apparatus.

.Tn producing the vacuum in the chamber 5, the embryo formation is disposed in an inverted position with the neck portion thereof supported in a cup-shaped block or plug 6 that is vertically slidable in the tubular support '7 carried by a base plate 8, the tubular support 7 confining a coil spring 9 upon which the plug 6 issupported. As clearly illustrated, diametrically opposite pins 10 project from the plug 6 and extend through side slots 11 formed in the tubular support 7, the lower ends of said slots being provided with offset pockets 12 cooperating with the pins 10 in a manner to be presently described.

The vacuum producing apparatus includes a flexible conduit 13 carrying an attaching plug 14 adapted for threading upon the externally threaded nipple 4 as shown in Fig. 1.

In placing the embryo formation in the vacuum producing apparatus, the plug 6 is lowered into the tubular support 7 against the tension of the spring 9 and turned therein to present the pins 10 for engagement with the side pockets l2 in the perpendicular slots 11, thereby returning the plug in a lowered position to facilitate the positioning of the embryo formation beneath the attaching plugs 14; of the flexible conduit 13. When the neck of the embryo formation has been so positioned, the plug 6 is slightlyturned and the spring 9 within the tubular support 7 will elevate the plug and the embryo formation mounted therein to present the nipple t carried by the bottom wall of the embryo formation for engagementby the screw plug 14L. During the operation of the vacuum pump, the

embryo formation is shaken or vibrated and tensioned by the coil spring 9, thus loosenmg all moisture and. gases from the metal plug 6 to present the radial pins l() for creepingin the lateral pockets 12, at which time the embryoformation may be readily lifted from the base support.

While there is herein shown and described the preferred embodiment of the present i-nventiom'it is nevertheless to be understood that minor changes may be made in the invention without departing from the spirit and scope thereof as claimed.

What is, claimed as new is o 1'. In the art of producing metal car-ales wherein an embryo formation-is employed which has an external configuration including a lower bulbous portion and an upper neck portion, the said embryo formation of the'carafe includes an inner wall and an outer wall, there being a vacuum chamber formed by the inner and outer walls; a

. vacuuinpump associated with the upper in verted end of the embryo formation, cushioned supporting means associated with the lower inverted endof the embryo formation to cause vibrations thereof during the evacuating ofthe-"chamber between the inner and outer walls,'s'aid supportingmeans including a tubular standard, a cushion spring therein, a supporting plug for the lower inverted endof the embryo formation resting on said sprin g, and means associated with said standard and plug for holding the latter against the action of said spring.

2. Inthe art of producing metal cara'fes wherein an embryo formation is employed which has an external con-figuration including a lower bulbous portion and an upper neck portion, the said embryo formation of the carafe including an inner wall and an outer wall forming a vacuum chamber therebetween, avacuum pump associated with the upper inverted end of the embryo formation, cushioned supporting means associated with the lower inverted end of the embryo fo'rmation to cause vibrations thereof during the evacuating of the chamber between the inner and outer walls, said supporting means-including atubular standard, a cushion springtherein, a supporting plug for the lower inverted end of the embryo formation resting on said spring, and cooperating guide pins and slots carried by the plug and tubular standard.

3. in the art of producing metal carafes wherein an embryo formation is employed which has an external configuration includinga lower bulbous portion and an upper neck portion.the said embryo formation of the carafe including an inner wall and an outer wall forming a vacuum chamber therebe'tween, a vacuum pump associated with the upper inverted end of the embryo formation, cushioned supporting means associated with the lower inverted end of the embryo formation to cause vibrations thereof during the evacuation of the chamber betweenthe inner and outer walls, said supporting means including a tubular standard, a cushioned spring therein, a supporting plug for the lower inverted end of the embryo formation resting on said spring, cooperating guide pins and slots carried by the plug and tubular standard, and means formed in the walls of said standard cooperating with the lower ends of said slots for receiving the pins to hold the plug in lowered position. I

. 4. In the art of-produci-ng metal carafes wherein an embryo formation is employed.

which has an external configuration including a lower bulbous portion and an upper neck portion, the said embryo formation of the carafe including an inner wall and an outer wall forming a vacuum chamber there'- between, a vacuum pump associated with the upper inverted end of the embryo formation, cushioned supporting means associated with the lower inverted end of the embryo: formation to cause vibrations thereof during the evacuating of the chamber between the inner and outer walls, said sup- 

